Phone Call Interrupts Internet Service

A while back, my computer was setup such that once online, incoming phone calls would not interrupt the internet service and the outside party would get a busy signal. Now when I am online, phone calls knock me off the line and ring in. I preferred it the way it was before but I do not know how to change the setting. HELP.

Disable Call waiting if you have it on your phone directions are in the front of your local telephone book. It's usually done by picking up the reciever of your phone and dialing *72 (or something close to)then you'll here two quick beeps then hang up. I found this out when a customer using dial-up ISP service had added a service package to their phone service ie Caller ID, Call Waiting, Call Fowearding etc when they all come in some nifty named package called Perfered user or something lol.
Hope this helps.